VX2000 Series Service Manual
VX
2000 series
6-5.5
R.G.B. Colors Contrast
Test Signal:
1600*1200@60Hz
Test Pattern:
R.G.B. Colors Intensities Pattern and 16 gray scale pattern
*
Check and see if each color is normal and distinguishable
*
If not, please return the unit to repair area
6-5.6
Screen Uniformity and Flicker
Test Signal:
1600*1200@60Hz
Test Pattern:
Full White Pattern
*
Check and see if it is in normal condition.
6-5.7
Dead Pixel and Line
Test Signal:
1600*1200@60Hz
Test Pattern:
Dark Screen Pattern
*
Check and see if there are dead pixels on LCD panel with shadow
gauge and filter film
*
The total numbers and distance of dead pixels should be compliant
with the spec.
6-5.8
Check for Secondary Display Modes
Test Signal:
640*350@70Hz
640*480@60/67/72/75/85Hz;
720*400@70Hz
800*600@56/60/72/75/85Hz;
832*624@75Hz
1024*768@60/70/72/75/85Hz;
1280*1024@60/75Hz
1600*1200@60Hz
6-5.9
All Mode Reset
After final QC step, we have to erase all saved changes again and
restore the factory defaults. You should do All Mode Reset again. (ref. 6-5.1)
ViewSonic Corporation
6-6
Confidential
– Do Not Co
py
VX2000-1
Normally when the primary mode 1600*1200@60Hz is well adjusted and compliant with the
specification, the secondary display modes will also be compliant with spec. They still need to
be checked and verified though.